Magnesium is a new type of light and corrosion-resistant metal material developed in the 20th century. The application of magnesium is mainly concentrated in the production of magnesium alloy, aluminum alloy production, desulfurization of steel-making and aviation and military industry. It is widely used in automobile manufacturing, light industry, metallurgy industry, chemical industry, electronic industry and instrument manufacturing. Magnesium alloys are favored by manufacturers of computers, home appliances and mobile phones for their excellent performance and good looks.
It has the advantages of low specific gravity, high strength per unit weight and high chemical stability, which makes Al - Mg alloy and its magnesium mold castings more popular, and the magnesium industry has developed rapidly. Magnesium alloy has the advantages of high strength, heat resistance, wear resistance and light weight, so it gradually replaces the plastic products and steel parts with a large proportion in the automobile industry, mainly replacing the original engine, steering wheel, seat base and so on. The United States, for example, gm's "Polaris V - 8" engines have 15 pounds (6.8 kg) of magnesium die casting parts, and the engine assembly in Cadillac vehicles, the company annual production of 25000 ~ 30000 in the mid - 90 - this kind of car, one requires magnesium, gm's annual output has remained at more than 9 million vehicles, Japan's Toyota car production with gm, only for the two companies for the demand of magnesium alloy is enough to make metal magnesium production enterprise with excitement.